[TASK] Move backend translations into Database.xlf

Resolves: #88239
Releases: master, 9.5
Change-Id: I09df1600304e4f0cff6d4cab6f45b0c966525a3c
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/60608


Tested-by: Mathias Brodala <mbrodala@pagemachine.de>
Tested-by: Dominik Merkel <merkel.dominik@googlemail.com>
Tested-by: Björn Jacob <bjoern.jacob@tritum.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Reviewed-by: Mathias Brodala <mbrodala@pagemachine.de>
Reviewed-by: Dominik Merkel <merkel.dominik@googlemail.com>
Reviewed-by: Björn Jacob <bjoern.jacob@tritum.de>
Reviewed-by: Joerg Kummer <typo3@enobe.de>
Reviewed-by: Susanne Moog <look@susi.dev>